Teftaceorum agri Fridrichsdalenfis, &c, 



Nerita fphcrrka Ancylus lacufrls 

 pifriiiciHs 



janilator Tellina rivalrs 



cnniorta amjika 



fnviatilis laciifris 



Valvata crijlata Mytillus auatinus. 



Tefiacea finiftrorfa, 



Helix tcrvipes 



cicatricofa 

 pomaria 

 varica 

 Jinijlra 

 inverfa 

 contraria 

 Icpvci 



quadridens 

 bidens 

 perverfa 

 papillaris 



Vertigo puflla 

 BucciNUM coliimna 

 Planorbis contrarius 



bulla 



turritus 



qelatijius. 



INDEX I. 



